Walter bobeets jones



' W.- R. JONES.

FURNACE.

d Patented Sept. 18, 1888.

(No M00181.) 2 sheets-41188 82.

.W. R. JONES.

FURNACE.

' No. 389,575. Patented Sept. 18,' 1888.

' w wwom m' w UNITED STATES PATENT OFFICE.

WALTER ROBERTS JONES, OF ROME, ITALY.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 389,575, dated September 18, 1888.

Application filed September 30, 1886. Serial No. 214,920. (No model.) Patented in Belgium January 31, 1885, No. 67.428; in England December 24. 1885, No. 15,865; in Italy February 4, 1886. No. 19,118; in Spain August 18, 1886, No. 9,131, and in France November 10, 1886, No. 166,242.

To aZZ whom it may concern."

Be it known that LWALTEaRoBER'rs J ONES, of Rome, in the Kingdom of Italy, have invented a new and useful Improvement in Furnaces, of which the following is a specification, reference being had therein to the accompanying drawings, no patents being obtained by me anywhere for this invention save in Great Britain, No. 15,865, dated December 24., 1885; in France, No. 166,242, dated November 10, 1886; in Belgium, No. 67,428, dated January 31, 1885; in Italy, No. 19,118, dated February 4, 1886, and in Spain, No. 9,131, dated August My invention consists in an improved form of furnace for burning coke and coke-dust and other lowgrades of fuel, as hereinafter described and illustrated.

In the drawings, Figure 1 represents a vertical cross-section of my improved furnace on the line a d of Fig. 2. Fig. 2represents a vertical longitudinal section of the furnace on the line a b of Fig. 1. Fig. 3 represents a front elevation of the furnace, and Fig. 4 a plan view of the same on the line 6 f of Fig. 2.

Throughout the drawings like letters refer to like parts.

W represents the brick walls of the furnace.

I and J representthe two combustion-chambers, of approximately equal capacity.

H and H represent the projections of the side walls of the furnace,which approach each.

other, forming a partition between. the two combustion-chambers I and J, and leaving only a slight opening of comparatively small cross section between the said chambers. These openings or nostrils are represented by the letter 0. They maybe straight plain slots or may be partly filled up with fire-clay.

G is the grate to the lower combustionchamber, which actually is the bottom of the furnace in question; P, the ash-pan for the same, containing a certain amount of water.

S is the door through which the fuel is charged to the furnace; T, the door through which the bar is inserted for the purpose of cleaning the slot or nostrils O.

V is a similar door for admitting the bar by which the fire upon the grate G may be stirred and for the removal of the scoria when required.

When a fire is to be started in my furnace, lumps of incandescent fuel are placed on thefirebrick partition H H, forming the floor of the upper combustion-chamber, I. The coke and coke-dust or other low-grade fuel which is to be used is then thrown in. As the combustion proceeds, the partially-burned fuel and liquid scoria drop down the slot or nostrils O and accumulate on the grate G, where the combustion is completed. When the furnace is in normal operation, this bed of fuel on the grate G reaches adepth of six or eight inches. The fuel is charged through the door S and accumulates in the chamber I in a moderately thick bed. All air is excluded above the grate Gin normal operation of the furnace. All the entering air therefore passes through the incandescent bed of fuelon the grate G. It is highly heated thereby, and a portion of it parts with the oxygen, which completes the combustion of the incandescent fuel, forming carbonic acid, (G0,) This heated air and carbonic acid then passes up through the nostrils O and enters the thick bed of fuel in the chamber I. A part of the heated air in its passage through the thick bed of fuel in the chamber unites with the carbon of the fuel in partial combustion, producing carbonic oxide, (00.) The carbonic-acid gas produced by previous combustion in the lower chamber, J, takes up another particle of carbon from the bed of fuel in the second combustion-chamber and is reduced to carbonic oxide again, (OOH-0:200.) The partial combustion heretofore described produces a large quantity of heat and a large quantity of carbonic-oxide gas. The latter passes out through the dues M M to the retorts of the furnace, (not shown here,) where it combines with the oxygen which has pre viously escaped combustion and with that which may leak in through any imperfect jointsin the furnace, thus producing more heat, which, in addition to that already produced by incomplete combustion in the combustionchambers, enables me to get the highest degree of heat efficiency from a very low grade of fuel.

The advantages of my construction are that, in the first place, an old furnace may be made over to run in accordance with my method at a comparatively low cost, the only change necessary being the addition of the partition H II, while in the second place new furnaces may be built upon my plan at the same cost as those now in use.

I am aware that in United States patents to Liegel and Schluter combustion-chambers having an analogous form to that of my upper chamber, 1, are shown, together with a small auxiliary grate below the (Llll.ll1b8l,WhlCh may be used when desired; but provision is made for dispensing with said grate, and in the operation of these furnaces they have been found to work better without it. In any case this second grate in no sense forms a second coinbustion chamber of nearly equal capacity, such as that (J) described in this application. Moreover, these furnaces described in the patents mentioned are regenerative furnaces, and provision is made for a large supply of air to the combustion'chamber above the fuel-line. I do not show or desire to claim any such construction, but confine my invention to the construction of a furnace having two combustionchambers of nearly equal capacity, with suitable connections between them, so that the partial combustion ofthe fuel in one chamber may be completed in the other, and the heat produced by this secondary combustion so ac celerate the combustion in the upper chamber that the very lowest grades of fuel may be used. I have found it desirable in practice, also, to admit no air whatever above the line of fuel in the upper combustion-chamber, or at any point other than the grate G, and this also is an important point in my invention.

Having therefore described my invention, what I claim as new, and desire to cover by Letters Patent, is

1. A furnace which has in combination two combustion-chambers of approximately equal capacity, placed one over the other, both said combustion-chambers being normally closed to the admission of air at all points other than the grate of the lower combustion-chamber, the partition between said chambers formed by drawing nearly together the walls of the furnace at a point midway of their height, and the long narrow slot constituting the passageway connecting said chambers, substantially as described.

2. A furnace having two combustion-chambers, placed one over the other, connected by suitable openings, and normally closed to the admission of air at all points other than the grate of the lower chamber, substantially as described.

3. A furnace having two combustion-chambers of approximately equal capacity, placed one over the other, connected together by suitable openings of comparatively small crosssection, and normally closed to the admission of air at all points other than the grate of the lower coinbustion-chambcr, substautiallyas described.

4. A furnace having the walls of its combustionchamber drawn nearly together at a point approximately midway of their height, substantially as described.

In witness whereof I hereunto set my hand in presence of two witnesses.

\VALTER ROBERTS JONES.

Vi tn ess es:

TUDONI ANTONIO, TOMMASO ROCCHIZ. 

